American Lung Association report found that about 156 million people live in counties plagued by high levels of ozone and fine particulate matter

The report found that people of color are more than twice as likely to live in a community with high ozone and particulate pollution, compared with white people.

A new report on air quality across the U.S. offers a cloudy prognosis on the long-term health of about 156 million residents who live in areas that received an "F" in smog and soot pollution.